Description: - Material: High quality diamond brazing process, toothed edge, durable and long service life. - Neat openings: smooth and no broken edges, no phenomenon.Design of chip removal hole: All specifications have special hole for chip removal. - Features: easy loading and unloading, saving time and effort. - Scope of application: Suitable for all kinds of stone, ceramics, vitrified tiles, glass, etc., making clean and accurate holes on glass and tiles.Specification: - Material: Diamond - Color: Golden - Cooling type (internal cooling/external cooling): external cooling - Opening diameter 6mm Size: The total length 6.5cm/2.56inch, upper handle diameter 6cm/2.36inch - Opening diameter 10mm Size: The total length 6.5cm/2.56inch, upper handle diameter 8cm/3.15inchPackage Includes:1 Piece Diamond Bit&;&;Note:Notes:1. Since this hole opener does not have a center positioning rotation, be careful in operation and please pay attention to safety.2. The speed should not fast.3. It is necessary to continuously add water for cooling, and it is strictly forbidden to ,high temperature friction occurs, and serious wear and tear will affect the use effect.